Drilling-machine.



G. B. RICHARDS.

DRILLING MACHINE.

APPLICATION FILED 1230.19,190s.

ggng'yg Patented July 13, 1909.

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G. B. RICHARDS.

DRILLING MACHINE.

APPLICATION FILED DEG.19,}1908.

Patented July 13, 1909.

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' DRILLING MACHINE.

APPLICATION FILED DEG. 19,1908.

Patented July 13, 1909.

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UNITED STATES PATENT OFFICE.

CHARLES B. RICHARDS, OF CLEVELAND, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE CLEVELAND ROCK DRILL COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO,

DRILLING-MACHINE To all whom it may concern:

Be it known that I, CHARLns B. RICHARDS, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a specification.

The invention relates to drilling machines and particularly to the means for feeding the mechanism and rotating the drill steel. The invention has for its principal objects; the provision of improved means whereby the drill steel may be rotated from the rear end of the mechanism; the provision of an improved construction wherein the feed piston is utilized as an element for rotating the drill steel; the provision of an improved arrangement of feed and operating cylinders and controlling valve therefor; and in general the provision of a compact and eflicient mechanism for effecting the feed of the machine and the rotation of the drill steel. One embodiment of the invention is illustrated in the accompanying drawings, wherein Figure 1 is a longitudinal section through the machine,

Figure 2 is a front end elevation,

Figure 3 is a section on the line III-III of Fig. 1,

Figure 4 is a rear end elevation,

Figure 5 is a plan view of the guide plate above the feed cylinder, the operating cylinder being removed,

Figure 6 is a section on the line VIV I of Fig. 5,

Figure 7 is an enlarged plan view of the controlling valve,

Figure 8 is a section on the line VIIIVIII of Fig. 7,

Figure 9 is a detail view of the rotating mepober of the valve removed from its casing, anc

Figures 10, 11 and 12 are sections on the lines X-X, XI-XI and XIIXII of Figure 9.

Referring first to the general arrangement of parts as illustrated in Figure 1, 1 is the support for the machine which may be mounted in any desired manner; 2 is the operating cylinder provided with the hammer-piston 3, the anvil 4, the drill-steel 5, and the valve chest 6; 7 is the feed cylinder; 8 is the feed piston; and 9 is the controlling valve which is seated upon the rear end of Specification of Letters Patent.

Application filed December 19, 1908.

Patented July 13, 1909.

Serial No. 468,291.

the feed cylinder and which governs the admission of fluid both to the operating cylinder and the feed cylinder.

Intermediate the operating cylinder 2 and feed cylinder 7 is the guideplate (Figures 1 and 3), which guide plate is slidingly mounted upon the support 1, being held in position by means of the plates 11. The piston 8 of the feed cylinder is provided with a rearwardly projecting shank 12, which shank has rigidly fixed to its rear end the rod 13 carrying the cross head 14. This cross head 14 (Figure 4) is rigidly secured to the support 1 by means of a pair of connecting rods 15, so that the feed piston 8 is maintained in fixed position with respect to the support 1, and the body of the machine may be fed back and forth, depending upon which side of the piston 8 fluid pressure is applied. The rod 13 is screw threaded at its rear end as indicated in Figure 1,and provided with the handle 15, which handle may be operated to retate the drill steel 5 by means of connections which will now be described. The drill steel 5 is, as indicated in Figure 2, cruciform in cross section, and is mounted for reciprocation in the chuck 16. This chuck carries at its forward end the spur gear 17, which gear meshes with a gear 18 mounted upon the stud 19. The gear 18 is driven from. the gear 20 mounted upon the shaft 21 mounted for rotation in the front head 22 of the feed cylinder. That portion of the shaft 21 which projects into the feed cylinder is polygonal in cross section, as indicated in Figure 3, and is adapted to fit and slide through the feed piston 8. It will be seen that by this arrangemept the rotation of the handle 15 and the is'ton 8 causes the rotation of the shaft 21 and the drill steel 5, so that the drill steel may be conveniently operated from the rear end of the machine. The utilizing of the piston 8 and its shank as a drive means renders the device very compact, and does away with the necessity of outside connections. The gears 18, 19 and 20 are securely maintained in )osition by means of the plates 23 and 24, the outer plate 24 serving as the outer bearing for the stud 19 and shaft 21. The plate 24 is held in position by means of connecting rods 25 (Figs. 2 and 4) extending between such plate and the rear head 26 of the operating cylinder. A resilient buffer 27 is interposed between the cross head 14 and rear head 28 of the feed cylinder.

The means whereby fluid pressure is supplied to the feed cylinder and operating cylinder is illustrated in detail in Figures 5 to 12 inclusive. By reference to Figure 5 it will be noted that the guide plate 10 is provided with three passages 29, 30 and 31, which passages open to the face of the plate at 32, 33 and 34 respectively, and lead respectively to the front end of the feed cylinder, to the rear end of the feed cylinder, and to the passage 35 (Figure 1), which latter passage in turn leads to the valve chest 6 from which the operating cylinder is supplied. The manner in which the passages 29 and 30 are connected to the interior of the feed cylinder at its two ends will be seen from Figure 1. The heads 22 and 28 are provided with annular passages 36 and 37 to which the passages 29 and 30 lead, and the passages 38 and 39 lead from these annular passages into the ends of the cylinder. The passages 32, 33 and 34 register with other passages 40, 41 and 42 in the valve casing (Figure 8), and admission to these passages is controlled by means of the rotary valve 43. The rotary valve member is pro vided with the longitudinal groove 44, and the three passages 45, 46 and 47 as indicated in Figures 10, 11 and 12. The passage 46 registers with a passage 48 (Figure 7) to which a connection from the source of fluid supply is made. The inoperative position of the device is that indicated in Fig. 8, at which time pressure is admitted through the passage 48, the groove 44, the passages 47, 41, 33 and 30 to the rear side of the feed piston, so that such feed piston is held with its front end in engagement with the front head of the feed cylinder. If now the valve is rotated slightly to the right, the passage 47 is brought out of registry with the passage 41, thus cutting off the supply of air to the rear side of the piston, and air is admitted to the front side of the piston from the groove 44 by means of the small passage 49 and the passages 32, 29, 36 and 38, thus feeding the machine ahead slowly and bringing it in position to operate. A further movement of the valve in the same direction brings the passage 45 (Figure 10) in registry with the passage 40, thus supplying more air to the front side of the feed piston to feed it ahead. At the same time the passage 46 (Figure 11) is brought into registry with the passage 34 and air is thus supplied to the valve chest 6 by the passages 42, 34, 31 and 35. A further movement of the valve to the right brings the passage 45 (Figure 10) into full registry with the passage 40, and the passage 46 into full registry with the passage 42, thus giving full working speed both to the feed piston and to the operating cylinder. At this time exhaust may occur from the rear side of the feed piston through the groove 50 and passage 51 (Figures 12 and 8). If now the valve is moved back to its original position with the passage 47 in registry with the passage 41 air is admitted to the rear side of the feed piston, thus forcing the machine to its rear position, and exhaust occurs from the front side of such feed piston through the groove 52 and passage 53 (Figures 8 and 10).

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is the following 1. In a drilling machine, a support, substantially parallel operating and feed cylinders slidably mounted upon the support, a rotary drill and means for operating it carried by the operating cylinder, a feed piston provided with a shank extending through the rearend of the feed cylinder and connected to the said support, a shaft j ournaled in the front end of the feed cylinder and having sliding but non-rotative engagement with the feed piston, gearing for rotating the drill from the shaft, and operating means for rotating the piston shank.

2. In a drilling machine, a support, substantially parallel operating and feed cylinders slidably mounted upon the support, a chuck mounted for rotation at the forward end of the operating cylinder, a drill steel mounted for longitudinal movement in the chuck, a feed piston provided with a shank extending through the rear end of the feed cylinder and connected to the said support, a shaft journaled in the front end of the feed cylinder and having sliding buthon-rotative engagement with the feed piston, gearing for rotating the chuck from the shaft, and 0 erating means for rotating the piston shan z.

3. The combination in a fluid operated drilling machine having a rotary drill steel and a feed cylinder, of a feed member comprising a hollow piston and shank mounted for rotation in the feed cylinder, a shaft extending through the feedcylinder and having sliding but non-rotative engagement with the feed member, means for holding the piston against longitudinal movement, and a handle for rotating the shank and gearing between the shaft and drill steel.

4. The combination in a fluid operated drilling machine having a rotary drill steel and a feed cylinder, of a support on which the machine is slidingly mounted, a hollow piston and shank mounted for rotation in the feed cylinder, a cross head swiveled on the shank and secured to the said support, a shaft extending through the feed cylinder and having sliding but non-rotative engagement with the hollow piston, means for rotating the shank, and gearing between the shaft and the drill steel.

5. The combination in a fluid operated drilling machine having a rotary drill steel feed cylinder, a cross head swiveled on the shank and secured to the said support, a shaft extending through the feed cylinder and having sliding but non-rotative engagement with the hollow piston, a resilient buller between the cross head and rear head of the feed cylinder, means for rotating the shank, and gearing between the front end of the shaft and the drill steel.

6. In a drilling machine, a support, sub stantially parallel operating and feed cylinders slidably mounted upon the support, a chuck mounted for rotation at the forward end of the operating cylinder, a drill steel mounted m the chuck, a feed member comi prising a feed piston and a shank extending through the rear end of the feed cylinder and connected to the said support, a shaft journaled in the lront end 01 the feed cylinder and having sliding but non-rotative engagement with the said l'eed member, gearing for rotating the chuck from the shaft, and operating means for rotating the piston shan c.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses.

CHARLES B. hICHAliDS. Witnesses:

1 J. CONNELLY, Geo. I'I. HALL. 

